1、选修八 Unit5 Meeting your ancestorsPeriod3 Grammar现在完成进行时1 定义:现在完成进行时表示动作从过去某一时间开始，一直延续到现在，可能还要继续下去。2 现在完成进行时的构成:现在完成进行时是由“have/has+been+动词的现在分词”构成3 现在完成进行时的基本句型肯定式 I/We have been working.疑问式 Have you been working？ 简略回答 Yes，I/we have. No，I/we havent.肯定式 He/She/It has been working.疑问式 Has he/she/it been
2、 working？ 简略回答 Yes，he/she/it has. No，he/she/it hasnt.4 现在完成时的用法1. 在强调指出动作还未结束，还要继续下去。如：Ive been reading this book for two hours，but I havent finished it. 这本书我已读了两个小时了，但我还没读完。Ive read this book.我已读完这本书了。2）强调动作延续时间的长久或带感情色彩。She has always been working like that.她一贯是这样工作的。3）现在完成进行时也可表示现在以前这段时间反复发生的事情。W
3、eve been seeing quite a lot of each other recently.最近我们经常见面。5 现在完成时和现在完成进行时的区别1）现在完成进行时更强调动作的延续性,它是现在完成时的强调形式。试比较：Weve been living here for ten years.Weve lived here for ten years.我们在这儿已经住了十年了。2）在不用时间状语的情况下，现在完成进行时表示动作仍在进行。而现在完成时则表示动作在过去已结束。如：The students have been preparing for the exam.（还在进行）学生们一直
4、在准备考试。The students have prepared for the exam.（已经结束）学生们为考试作了准备。3）有些表示状态，感情，感觉的动词如：have，exist，like，hate，hear，know，sound等动词不能用于现在完成进行时，但可用于现在完成时。如：Theyve known each other since 1970.自从1970年起他们就相互认识了。(1) 现在完成时可以表示一个已经完成的动作，而现在完成进行时则表示一个正在进行的动作：I have read the book. 我读过这本书。I have been reading the book.
5、我一直在读这本书。【注】有少数动词(如work, study, live, teach, stay等)在表示持续一时间时用这两种时态含义差不多(只是用现在完成进行进更强调动作的持续性)：How long have you worked been working here? 你在这儿工作多久了？Ive lived been living here since 1988. 自1988年以来我就一直住在这儿。(2) 现在完成时通常只陈述事实，而现在完成进行时还可表示一种感*彩：I have waited for two hours. 我等了两小时。(陈述事实)I have been waiting
6、for two hours. 我等了两个小时。(等得好辛苦)(3) 现在完成进行时通常用来谈论较短暂的动作或情况，若要谈论时间延续较长的动作或情况或永久性情况，则通常用现在完成时：He has lived in Paris. 他(一直)住在巴黎。He has been living in Paris. 他(目前)住在巴黎。(表暂时性)(4) 不用于进行时态的动词通常也不用于现在完成进行时，但它们可以用于现在完成时：Ive only known her for two day. 我认识她刚刚两天。Theyve been married for twenty years. 他们结婚已二十年了。Th
7、e war has lasted for a long time. 这场战争持续了很长时间。(5) 现在完成进行时不用于被动语态，若要用可用现在完成时的被动语态代替：The house has been painted for a month. 这房子已漆了一个月。The problem has been studied for five days. 这个问题已研究了五天。练习:1. Mr Li swimming for 3 hours, and his son an hour ago.1. has been, started B.have started, has startedC.star
8、ted, started D. Has started, has started1. -How long you stamps? -Since two years ago.1. have, collect B.have, been collecting C.did, collect D.are, collecting1. She had a headache because she too long. She ought to shop.1. has been reading B.had read C.is reading D.read1. The boy TV all the morning
9、.1. has watched B.had watched C.has been watching D.watched1. - have you been learning to swim? -Half a year.1. How long B. How often C.How far D.WhenA. Our teacher has been teaching in this school for .1. two year and a half B.two and a half yearC.two years and half D.two and a half years1. He it f
10、or two hours, and hes still watching now.1. has been watched B.watching C.has been watching D.is watching现在完成时态练习题答案一翻译下列句子：1. Have you ever had / eaten fish and chips?2. I have just lost my chemistry book.3. I have never been to the farm before.4. He has already had lunch = He has had lunch already
11、.5. Have you seen the movie yet?6. My brother hasnt come /get / been back yet = My brother hasnt returned yet.7. I have had this dictionary for three years / since three years ago.8. Has been away from China for three years.9.I have known them for five years.10. They have been in the USA for five years.11. He has been here since he moved to Jining.12. My sister has been a college student for three years = My sister has been in college for three years.13. They have known each other since 1999.14. I have been in this school for over three years.